Classic Mini Large Valve Performance Cylinder Head – Fast Road / Track Spec (9-Stud)
 
Unlock serious performance from your Classic Mini or Moke with this fast road / track-ready large valve cylinder head, engineered to deliver maximum horsepower and torque while maintaining excellent drivability.
 
Developed using proven airflow bench and dyno testing, this head is optimised for modern fast road and road/rally camshaft setups—making it the perfect choice for enthusiasts who want real-world performance gains.
 
Key Features & Specifications:
 
Large valve configuration:
35.7mm inlet valves
29.5mm exhaust valves
 
High-grade EN214N stainless steel valves (plasma-nitrided for durability)
Manganese bronze valve guides – improved heat transfer & longevity
Genuine Rover copper-beryllium exhaust valve seats (lead-free compatible)
Double valve springs (220lb @ max lift) for high RPM stability
Capable of up to 8,000 RPM and 0.500" valve lift
Combustion chamber volume: approx. 21.4cc
9-stud head configuration for superior clamping strength
Supplied with bypass hose and heater take-off ports open
 
Performance Engineering:
Port and throat geometry optimised for maximum airflow and efficiency
Designed to work with:
Fast road camshafts
Road/rally camshaft setups
Delivers strong BHP and torque gains across the rev range
Optimised for modern unleaded fuel and higher compression ratios
 
Built For:
Fast road Classic Mini builds
Track days & weekend performance cars
Hill climbs & auto-testing
Enthusiasts wanting a proven, high-performance cylinder head setup
 
Stage Equivalent (Guide Only):
Comparable to a “Stage 3” performance cylinder head
(race-quality valves with Super Sport / Grand Tourer specification porting)
 
Important Notes:
No bypass hose adapter fitted
Supplied as an exchange unit (core required in re-workable condition)
 
Core must be:
Crack-free
Unmodified (standard casting)
Complete with valves, springs, caps & collets
Non-exchange surcharge applies
 
At Mini World Australia, we focus on parts that actually deliver results—not just claims. This cylinder head is built for drivers who want real, usable performance on the road or track.
 
Serious airflow = serious power.